CN105245944B - Based on the multiple terminals DVB program broadcasting method and system, set-top box and mobile terminal - Google Patents

Abstract

The invention relates to the application field of set-top boxes, and discloses a DVB-based multi-terminal program playing method and system, a set-top box and a mobile terminal. The method includes: the set-top box connects to the local area network and broadcasts the service and IP address that can be provided; the set-top box receives the connection request from the mobile terminal; the set-top box judges whether the request meets the preset conditions, and responds respectively; The set-top box receives the program list and the EPG request from the mobile terminal and returns the request; the set-top box receives the program play request from the mobile terminal, and the request includes program ID information; the set-top box opens the DVB module according to the program ID information and The TS data of the program is received; the set-top box encrypts the TS data of the program and sends it to the mobile terminal. The invention realizes the function of playing programs on several mobile terminals through a DVB set-top box with network function, saves expenses for users and improves user experience.

Description

Method and system for playing multi-terminal programs based on DVB, set-top box and mobile terminal

【Technical field】

The invention relates to the application field of set-top boxes, in particular to a DVB-based multi-terminal program playing method and system, a set-top box and a mobile terminal.

【Background technique】

With the continuous development and deepening of digital TV, the popularity of digital TV set-top boxes in households is getting higher and higher, and the user's demand for set-top boxes is also developing in a differentiated way:

Users' demand for a second set-top box in the home continues to increase. But operators are hesitant to meet the demand for a second set-top box in the home. On the one hand, users are unwilling to spend two viewing fees in one family. On the other hand, operators face practical difficulties in the management of the second box in the family and the increase in hardware costs. The existing method is to realize the viewing of the second set-top box in the family through the mother-child card. First, the user or the operator needs to purchase the second set-top box and a smart card. Second, in order to prevent the second set-top box from flowing into other households, the operator needs to activate the sub-card through the main card from time to time.

With the continuous development of mobile terminals headed by mobile phones, users are more and more willing to watch TV programs through mobile terminals such as mobile phones and PDAs. But watching TV programs through the Internet is limited by conditions such as program source copyright, real-time performance, and network bandwidth.

Due to limitations of technical level and hardware conditions, the mobile terminal cannot integrate the existing Conditional Access System (CAS) system descrambling in the set-top box field. Therefore, for encrypted programs, the general method is: 1. Put the program on the set-top box decrypt. 2. Send the decrypted audio and video data to the mobile terminal for decoding and playback.

When playing a program source of a Digital Video Broadcasting (Digital Video Broadcasting, DVB) set-top box on multiple terminals, the protection of the program content is the first issue to be considered. If the decrypted audio and video data can be obtained through relatively simple technical means, it is equivalent to cracking the CAS system of the operator, which is a consequence that the operator does not want to see.

【Content of invention】

The technical problem to be solved by the present invention is to realize watching TV programs on multiple mobile terminals through a DVB set-top box with network functions. In addition, for encrypted programs, it solves the problem that audio and video resources cannot be simply copied.

In order to solve the above technical problems, the present invention provides the following technical solutions.

In the first aspect, the present invention provides a method for playing programs based on DVB multi-terminals, characterized in that the method includes:

The set-top box is connected to the LAN and broadcasts the services and IP addresses it can provide;

The set-top box receives a connection request from a mobile terminal, and the connection request includes mobile terminal ID information;

The set-top box judges whether the request meets a preset condition:

When judging that the request does not meet the preset condition, the set-top box returns an error code to the mobile terminal;

When it is judged that the request satisfies the preset condition, the set-top box generates a connection file and returns it to the mobile terminal, the connection file contains the public key in the randomly generated RSA key pair, so that the mobile terminal can use The public key is connected to the set-top box;

The set-top box receives the program list and EPG request from the mobile terminal and returns the program list and EPG to the mobile terminal;

The set-top box receives a program play request from a mobile terminal, and the program play request includes program ID information;

The set-top box opens the DVB module according to the program ID information and receives the TS data of the program;

The set-top box encrypts the TS data of the program and sends it to the mobile terminal.

In some embodiments, the preset conditions include: the mobile terminal is allowed to connect, the total number of connections of the mobile terminal does not exceed the allowed maximum number, and the mobile terminal does not have a large number of connections within a short period of time.

In a second aspect, the present invention provides another method for playing programs based on DVB multi-terminals, characterized in that the method includes:

The mobile terminal connects to the local area network and searches for a set-top box that provides services in the local area network;

The mobile terminal sends a connection request including the ID information of the mobile terminal to the set-top box, so that the set-top box can use the ID information to determine whether a preset condition is met;

When judging that the request does not meet the preset condition, the mobile terminal receives an error code returned by the set-top box;

When it is determined that the request satisfies the preset condition, the mobile terminal receives the connection file generated by the set-top box, and the connection file contains the public key in the randomly generated RSA key pair, so that the mobile terminal can use the The public key is used to connect the set-top box;

The mobile terminal sends a program list and an EPG request to the set-top box;

The mobile terminal sends a program play request including program ID information to the set-top box;

The mobile terminal receives the encrypted TS data sent by the set-top box, and decrypts the encrypted TS data through a decryption key, stores and plays the encrypted TS data.

In some embodiments, the preset conditions include: the mobile terminal is allowed to connect, the total number of connections of the mobile terminal does not exceed the allowed maximum number, and the mobile terminal does not have a large number of connections within a short period of time.

In a third aspect, the present invention provides a multi-terminal program broadcasting system based on DVB, wherein the system includes:

The first connection module is used to connect the set-top box to the local area network and broadcast the services and IP addresses that the set-top box can provide;

A first receiving module, configured to receive a connection request from a mobile terminal, where the request includes ID information of the mobile terminal;

A first judging module, configured to judge whether the request satisfies a preset condition;

The first processing module is configured to return an error code to the mobile terminal when the request does not meet the preset condition; generate a connection file and return it to the mobile terminal when the request meets the preset condition terminal, the connection file includes the public key in the randomly generated RSA key pair, so that the mobile terminal can use the public key to connect to the set-top box;

The second receiving module is used to receive the program list and EPG request from the mobile terminal and return the request;

The third receiving module is used to receive a program playing request from a mobile terminal, the request including program ID information;

The second processing module is used to open the DVB module according to the program ID information and receive the TS data of the program;

The first sending module is used for encrypting the TS data of the program and sending it to the mobile terminal.

In some embodiments, the preset conditions include: the mobile terminal is allowed to connect, the total number of connections of the mobile terminal does not exceed the allowed maximum number, and the mobile terminal does not have a large number of connections within a short period of time.

In a fourth aspect, the present invention provides a set-top box, which is characterized in that the set-top box includes the DVB-based multi-terminal program playing system of the third aspect.

In the fifth aspect, the present invention provides another DVB-based multi-terminal program broadcasting system, characterized in that the system includes:

The fourth connection module is used to connect to the local area network and find a set-top box providing services in the local area network;

A fourth sending module, configured to send a connection request including the mobile terminal ID information to the set-top box, so that the set-top box can use the ID information to determine whether a preset condition is met;

A fourth judging module, configured to judge whether the request satisfies a preset condition;

A fourth processing module, configured to receive, by the mobile terminal, an error code returned by the set-top box when the request does not meet the preset condition; and receive, by the mobile terminal, an error code when the request meets the preset condition. The connection file generated by the set-top box, the connection file contains the public key in the randomly generated RSA key pair, so that the mobile terminal can use the public key to connect to the set-top box;

A fifth sending module, configured to send a program list and an EPG request to the set-top box;

A sixth sending module, configured to send a program play request including program ID information to the set-top box;

The fourth receiving module is used to receive the encrypted TS data sent by the set-top box, and decrypt the encrypted TS data through the decryption key, store and play.

In some embodiments, the preset conditions include: the mobile terminal is allowed to connect, the total number of connections of the mobile terminal does not exceed the allowed maximum number, and the mobile terminal does not have a large number of connections within a short period of time.

In a sixth aspect, the present invention provides a mobile terminal, which is characterized in that the mobile terminal includes the DVB-based multi-terminal program playing system in the fifth aspect.

The beneficial effect of the present invention is that a DVB set-top box with a network function realizes the function of playing programs on several mobile terminals, which saves expenses for users on the one hand, and improves user experience on the other hand, and through encryption and decryption The program file is transmitted in a unique way, which protects the program file, makes the program file no longer simply copied and transmitted, and protects the interests of the operator.

【Description of drawings】

FIG. 1 is a schematic diagram of an implementation environment involved in an embodiment of the present invention;

Fig. 2 is a flow chart of a method for playing programs based on DVB multi-terminals provided by Embodiment 1 of the present invention;

Fig. 3 is a detailed flow chart of step S1032 of a DVB-based multi-terminal program playing method provided in Embodiment 1 of the present invention;

FIG. 4 is a flow chart of another DVB-based multi-terminal program playback method provided by Embodiment 2 of the present invention;

FIG. 5 is a flow chart of information interaction in a specific application scenario provided by Embodiment 3 of the present invention;

FIG. 6 is a structural block diagram of a DVB-based multi-terminal program playback system provided by Embodiment 4 of the present invention;

Fig. 7 is a kind of specific structural block diagram based on DVB multi-terminal program broadcasting system processing module 23 that embodiment 4 of the present invention provides;

Fig. 8 is a structural block diagram of another DVB-based multi-terminal program playing system provided by Embodiment 5 of the present invention.

【Detailed ways】

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

As shown in FIG. 1 , an implementation environment involved in the embodiment of the present invention is shown, and the implementation environment includes a set-top box 100 and a mobile terminal 200 . The set-top box 100 is a DVB set-top box with a network function, and the DVB set-top box with a network function is used to receive DVB signals (DVB-S satellite and DVB-C cable TV) and decode and convert them The DVB set-top box with network function includes an on-demand platform function, a live TV function, a local playback function, and an application program function. The mobile terminal 200 may be a mobile phone, a tablet computer, a notebook, a set-top box for a TV set, a wearable device (smart bracelet, smart watch, smart glasses, etc.), an educational electronic device (point reader, story machine, etc.) Smart devices, preferably mobile phones, tablet computers, and notebooks, can be connected to the set-top box 100 through a wired network or a wireless network, so as to achieve the purpose of sending requests to the set-top box 100 and receiving the content sent by the set-top box 100.

Example 1

As shown in Fig. 2, the embodiment of the present invention provides a kind of method based on DVB multi-terminal program broadcasting, and described method comprises:

S101, the set-top box connects to the local area network and broadcasts the services and IP addresses it can provide.

After the set-top box is connected to the local area network through wi-fi or a wired network, it broadcasts in the local area network all services that the set-top box can provide and the protocol for interconnection between networks through universal plug and play (UPNP) (Internet Protocol, IP) address. The UPNP is a common peer-to-peer network connection architecture for PCs and smart devices (or instruments), especially in families, UPNP is based on Internet standards and technologies (such as TCP/IP, HTTP and XML) The foundation is that such devices can automatically connect and work together with each other, thereby making the network (especially the home network) possible for more people. The services include online video-on-demand, live TV programs, local playback and installation of various applications, etc. The IP address is the logical address of the set-top box, which is a uniform address format provided by the IP protocol, and specifies the rules that the set-top box should abide by when communicating on the Internet.

S102. The set-top box receives a connection request from a mobile terminal, where the connection request includes mobile terminal ID information.

The connection request received by the set-top box from the mobile terminal is a hypertext transfer protocol (HyperTextTransfer Protocol, HTTP) request, and the uniform resource locator (Uniform ResourceLocator, URL) of the connection request is: http://set-top-box IP address/ requiredconnect.html? uniqueId="Mobile terminal unique ID". Wherein said "mobile terminal unique ID" is the ID (such as MAC address) that can uniquely mark this mobile equipment, is used for in the communication with described set-top box, uniquely determines this mobile terminal, and in the future each time described mobile terminal The ID is carried in the HTTP interaction with the set-top box.

S103. The set-top box judges whether the request satisfies a preset condition.

S1031. When it is determined that the request does not meet the preset condition, the set-top box returns an error code to the mobile terminal.

After the set-top box receives the connection request, it first judges whether the current set-top box satisfies the preset conditions. The preset conditions include: the mobile terminal is allowed to connect, the total number of mobile terminal connections does not exceed the maximum number allowed, and the mobile terminal Not having a large number of connections in a short period of time (to prevent breaking the AES-256 key described below through large data, thereby breaking the key system). The error code is returned via HTTP.

S1032. When it is determined that the request satisfies the preset condition, the set-top box generates a connection file and returns it to the mobile terminal, the connection file contains the public key in the randomly generated RSA key pair, so that the mobile terminal The set-top box can be connected using the public key.

As shown in Figure 3, it should be noted that when it is judged that the request satisfies the preset condition, it is also necessary to judge whether the mobile terminal has been connected, and if not, a dialog pops up on the display interface of the set-top box Frame, requires the user to select whether to agree to the connection of the new mobile terminal, if the user agrees to connect, the set-top box generates a connection file and returns to the mobile terminal, otherwise an error code is returned to the mobile terminal; if this mobile terminal has ever been connected, Then, without user confirmation, the set-top box generates a connection file and returns it to the mobile terminal.

The connection file contains the public key in the randomly generated RSA key pair, so that the mobile terminal can use the public key to connect to the set-top box. The RSA is an influential public-key encryption algorithm, which can resist most of the cryptographic attacks known so far, and has been recommended by the International Organization for Standardization as a public-key data encryption standard. The public key in the RSA key pair contained in the connection file is returned after being encrypted by Advanced Encryption Standard (AES)-256, wherein the encryption key and decryption key of the AES-256 are respectively embedded in In the set-top box and the mobile terminal APP.

S104, the set-top box receives the program list and EPG request from the mobile terminal and returns the program list and EPG to the mobile terminal.

After the mobile terminal is successfully authenticated, it requests a program list and an electronic program guide (Electronic Program Guide, EPG) from the set-top box through HTTP, and the set-top box receives the request and returns the request, and the mobile terminal displays the request through the APP on the mobile terminal. Program list and EPG.

S105. The set-top box receives a program play request from the mobile terminal, where the program play request includes program ID information.

When the user clicks on a program to be watched, a program play request is sent to the set-top box, and the request sends a connection string http://set-top-box IP address/playlist.m3u8?byHTTP? Program-ID = "Program Unique ID". Wherein, the "program unique ID" is an ID that can uniquely mark the program, and is used to receive the program that the user needs to watch later. The playlist.m3u8 is a program list file described in the HTTP Live Streaming (HLS) protocol, which describes the URL and attributes of the multimedia file, the encryption method, and the URL and attributes of the encryption key file.

S106, the set-top box opens the DVB module according to the program ID information and receives the TS data of the program.

The set-top box opens the DVB module according to the ID information uniquely marking the program, and the DVB module is used to receive the transport stream (Transport Stream, TS) data of the program. It should be noted that if the DVB program passes the conditional access system (Conditional Access System, CAS) scrambled, first descramble the program and then receive the multimedia file data of the program.

S107. The set-top box encrypts the TS data of the program and sends it to the mobile terminal.

The process of encrypting the TS data is: randomly generating a 16-bit AES-128 key pair; using the encryption key to encrypt the TS file; encrypting the decryption key with the private key in the RSA key pair and placing it in the In the key file; put the URL of the TS and the URL of the key file in the playlist.m3u8 file.

The encrypted TS data is returned to the mobile terminal through HTTP.

The embodiment of the present invention provides a method for playing programs based on DVB multi-terminals. The method realizes the function of playing programs on several mobile terminals through a DVB set-top box with network functions. On the one hand, it saves expenses for users, and on the other hand On the one hand, the user experience is improved, and the program files are transmitted through encryption and decryption, which protects the program files, prevents the program files from being simply copied and transmitted, and protects the interests of operators.

Example 2

As shown in Figure 4, the embodiment of the present invention provides another DVB-based multi-terminal program playback method, the method comprising:

S201, the mobile terminal connects to the local area network and searches for a set-top box providing services in the local area network.

After the mobile terminal is connected to the same local area network as the set-top box through wi-fi or a wired network, it searches for a set-top box that can provide services in the local area network through UPNP.

S202. The mobile terminal sends a connection request including the ID information of the mobile terminal to the set-top box, so that the set-top box can use the ID information to determine whether a preset condition is met.

The mobile terminal sends a connection request to the set-top box through HTTP, and the uniform resource locator (Uniform Resource Locator, URL) of the connection request is: http://set-top-box IP address/requiredconnect.html? uniqueId="Mobile terminal unique ID". Wherein said "mobile terminal unique ID" is the ID (such as MAC address) that can uniquely mark this mobile equipment, is used for in the communication with described set-top box, uniquely determines this mobile terminal, and in the future each time described mobile terminal The ID is carried in the HTTP interaction with the set-top box.

S203. When it is determined that the request does not meet the preset condition, the mobile terminal receives an error code returned by the set-top box.

The preset conditions include: the mobile terminal is allowed to connect, the total number of connections of the mobile terminal does not exceed the maximum number allowed, and the mobile terminal does not have a large number of connections in a short period of time. The error code is returned to the mobile terminal via HTTP.

S204. When it is determined that the request satisfies the preset condition, the mobile terminal receives the connection file generated by the set-top box, the connection file contains the public key in the randomly generated RSA key pair, so that the mobile terminal can The set-top box is connected using the public key.

It should be noted that if it is determined that the request meets the preset conditions, it is also necessary to determine whether the mobile terminal has been connected, if not, a dialog box will pop up on the display interface of the set-top box, asking the user to choose whether to agree For the connection of a new mobile terminal, if the user agrees to connect, the mobile terminal receives the connection file generated by the set-top box, otherwise an error code is returned to the mobile terminal; if this mobile terminal has ever been connected, no user confirmation is required, the The mobile terminal receives the connection file generated by the set-top box.

S205. The mobile terminal sends a program list and an EPG request to the STB.

After the mobile terminal is authenticated successfully, it requests the program list and EPG from the set-top box through HTTP, the set-top box receives the request and returns the request, and the mobile terminal displays the program list and EPG through the APP on the mobile terminal.

S206. The mobile terminal sends a program play request including program ID information to the set-top box.

When the user clicks on a program to be watched, a program play request is sent to the set-top box, and the request sends a connection string http://set-top-box IP address/playlist.m3u8?byHTTP? Program-ID = "Program Unique ID". Wherein, the "program unique ID" is an ID that can uniquely mark the program, and is used to receive the program that the user needs to watch later. Wherein, playlist.m3u8 is a program list file described in the HLS protocol, which describes the URL and attributes of the multimedia file, the encryption method, and the URL and attributes of the encryption key file.

S207. The mobile terminal receives the encrypted TS data sent by the set-top box, and decrypts the encrypted TS data by using a decryption key, and stores and plays the encrypted TS data.

The TS data is received and obtained after opening the DVB module by the program ID information, and the decryption process of the TS data is: using the public key in the RSA key pair to decrypt the key file; obtaining the AES from the key file - the decryption key in the 128 key pair; encrypt the decryption key with the private key in the RSA key pair and place it in the key file; use the AES-128 decryption key to decrypt the TS file. The decrypted TS data is sent to the decoder for decoding, storage and output for playback.

The embodiment of the present invention provides a DVB-based multi-terminal program playing method. The method uses a mobile terminal to find a set-top box in the same network connection, and seeks and obtains services provided by the set-top box. The function of playing programs, on the one hand, saves expenses for users, and on the other hand, improves user experience, and transmits program files through encryption and decryption, which protects program files and makes program files no longer simply copied and transmitted. The interests of operators are protected.

Example 3

As shown in Figure 5, the information interaction process between the set-top box and the mobile terminal provided by the embodiment of the present invention is as follows:

Mobile terminal request authentication process: after the set-top box is connected to the local area network through wi-fi or wired network, it broadcasts all services and IP addresses that the set-top box can provide in the local area network through UPNP. After the mobile terminal is connected to the same local area network as the set-top box through wi-fi or a wired network, it searches for a set-top box that can provide services in the local area network through UPNP. The mobile terminal sends a connection request including the ID information of the mobile terminal to the set-top box, so that the set-top box can use the ID information to determine whether a preset condition is met. The set-top box judges whether the request meets a preset condition, and when it is judged that the request does not meet the preset condition, the set-top box returns an error code to the mobile terminal; when it is judged that the request satisfies the preset condition, Then it is also necessary to judge whether the mobile terminal has been connected, if not, a dialog box will pop up on the display interface of the set-top box, requiring the user to select whether to agree to the connection of the new mobile terminal, if the user agrees to connect, the set-top box generates a connection file and return to the mobile terminal, otherwise an error code is returned to the mobile terminal; if the mobile terminal has been connected, no user confirmation is required, the set-top box generates a connection file and returns to the mobile terminal.

The process of requesting playback by the mobile terminal: the mobile terminal sends a program list and an EPG request to the set-top box, and the set-top box receives the request and returns the request. The mobile terminal sends a program playing request including program ID information to the set-top box. The set-top box receives a program play request from the mobile terminal, the request includes program ID information, the set-top box opens the DVB module according to the program ID information and receives the TS data of the program, and the set-top box converts the TS data of the program Data is encrypted and sent to the mobile terminal. The mobile terminal receives the encrypted TS data sent by the set-top box, and decrypts the encrypted TS data through a decryption key, stores and plays the encrypted TS data.

The embodiment of the present invention provides an information interaction flow process between a set-top box and a mobile terminal, realizes a DVB-based multi-terminal program playing method, and enriches the user experience mode of watching TV programs through a mobile terminal.

Example 4

As shown in Figure 6, the embodiment of the present invention provides a DVB-based multi-terminal program playback system, the system 200 includes:

The first connection module 20 is used to connect the set-top box to the local area network and broadcast the services and IP addresses that the set-top box can provide;

The first receiving module 21 is configured to receive a connection request from a mobile terminal, the request including ID information of the mobile terminal;

A first judging module 22, configured to judge whether the request satisfies a preset condition;

The first processing module 23 is configured to return an error code to the mobile terminal when the request does not meet the preset condition; generate a connection file and return it to the mobile terminal when the request meets the preset condition Mobile terminal, the connection file includes the public key in the randomly generated RSA key pair, so that the mobile terminal can use the public key to connect to the set-top box;

The second receiving module 24 is used to receive the program list and the EPG request from the mobile terminal and return the request;

The third receiving module 25 is configured to receive a program playing request from a mobile terminal, the request including program ID information;

The second processing module 26 is used to open the DVB module according to the program ID information and receive the TS data of the program;

The first sending module 27 is configured to encrypt and send the TS data of the program to the mobile terminal.

As shown in FIG. 7, the above-mentioned first processing module 23, when the request satisfies the preset condition, the processing module 23 further includes:

Judging module 231, used to judge whether the mobile terminal has been connected;

The processing module 232 is used to generate a connection file and return it to the mobile terminal when the mobile terminal has been connected, and the user can choose whether to connect when the mobile terminal has not been connected;

Judging module 233, used to judge whether the user chooses to connect;

The processing module 234 is configured to return an error code to the mobile terminal when the user chooses not to connect, and generate a connection file and return it to the mobile terminal when the user chooses to connect.

The embodiment of the present invention provides a DVB-based multi-terminal program playing system. The system realizes the function of playing programs on several mobile terminals through a DVB set-top box with network function. On the one hand, the user experience is improved, and the program files are transmitted through encryption and decryption, which protects the program files, prevents the program files from being simply copied and transmitted, and protects the interests of operators.

Example 5

As shown in FIG. 6 and FIG. 7 , an embodiment of the present invention provides a set-top box, and the set-top box includes the DVB-based multi-terminal program playing system described in Embodiment 4. Specifically, the set-top box includes:

The first connection module 20 is used to connect the set-top box to the local area network and broadcast the services and IP addresses that the set-top box can provide;

The first receiving module 21 is configured to receive a connection request from a mobile terminal, the request including ID information of the mobile terminal;

A first judging module 22, configured to judge whether the request satisfies a preset condition;

The first processing module 23 is configured to return an error code to the mobile terminal when the request does not meet the preset condition; generate a connection file and return it to the mobile terminal when the request meets the preset condition Mobile terminal, the connection file includes the public key in the randomly generated RSA key pair, so that the mobile terminal can use the public key to connect to the set-top box;

The second receiving module 24 is used to receive the program list and the EPG request from the mobile terminal and return the request;

The third receiving module 25 is configured to receive a program playing request from a mobile terminal, the request including program ID information;

The second processing module 26 is used to open the DVB module according to the program ID information and receive the TS data of the program;

The first sending module 27 is configured to encrypt and send the TS data of the program to the mobile terminal.

The above-mentioned first processing module 23, when the request satisfies the preset condition, the processing module 23 also includes:

Judging module 231, used to judge whether the mobile terminal has been connected;

The processing module 232 is used to generate a connection file and return it to the mobile terminal when the mobile terminal has been connected, and the user can choose whether to connect when the mobile terminal has not been connected;

Judging module 233, used to judge whether the user chooses to connect;

The processing module 234 is configured to return an error code to the mobile terminal when the user chooses not to connect, and generate a connection file and return it to the mobile terminal when the user chooses to connect.

The embodiment of the present invention provides a set-top box. The set-top box is a DVB set-top box with network function. The set-top box realizes the function of playing programs on several mobile terminals. , improve user experience, and transmit program files through encryption and decryption, which protects program files, makes program files no longer simply copied and transmitted, and protects the interests of operators.

Example 6

As shown in Figure 8, the embodiment of the present invention provides another DVB-based multi-terminal program playback system, the system 300 includes:

The fourth connection module 30 is used to connect to the local area network and search for a set-top box that provides services in the local area network;

The fourth sending module 31 is configured to send a connection request including the ID information of the mobile terminal to the set-top box, so that the set-top box can use the ID information to determine whether a preset condition is met;

A fourth judging module 32, configured to judge whether the request satisfies a preset condition;

The fourth processing module 33 is configured to: when the request does not meet the preset condition, the mobile terminal receives an error code returned by the set-top box; when the request meets the preset condition, the mobile terminal Receive the connection file generated by the set-top box, the connection file includes the public key in the randomly generated RSA key pair, so that the mobile terminal can use the public key to connect to the set-top box;

The fifth sending module 34 is configured to send a program list and an EPG request to the set-top box;

The sixth sending module 35 is configured to send a program play request including program ID information to the set-top box;

The fourth receiving module 36 is configured to receive the encrypted TS data sent by the set-top box, and decrypt the encrypted TS data through the decryption key for storing and playing.

The embodiment of the present invention provides a DVB-based multi-terminal program playing system. The system uses a mobile terminal to search for a set-top box in the same network connection, and seeks and obtains services provided by the set-top box. The function of playing programs, on the one hand, saves expenses for users, and on the other hand, improves user experience, and transmits program files through encryption and decryption, which protects program files and makes program files no longer simply copied and transmitted. The interests of operators are protected.

Example 7

As shown in FIG. 8 , an embodiment of the present invention provides a mobile terminal, and the mobile terminal includes the DVB-based multi-terminal program playing system described in Embodiment 6. Specifically, the mobile terminal includes:

The fourth connection module 30 is used to connect to the local area network and search for a set-top box that provides services in the local area network;

The fourth sending module 31 is configured to send a connection request including the ID information of the mobile terminal to the set-top box, so that the set-top box can use the ID information to determine whether a preset condition is met;

A fourth judging module 32, configured to judge whether the request satisfies a preset condition;

The fourth processing module 33 is configured to: when the request does not meet the preset condition, the mobile terminal receives an error code returned by the set-top box; when the request meets the preset condition, the mobile terminal Receive the connection file generated by the set-top box, the connection file includes the public key in the randomly generated RSA key pair, so that the mobile terminal can use the public key to connect to the set-top box;

The fifth sending module 34 is configured to send a program list and an EPG request to the set-top box;

The sixth sending module 35 is configured to send a program play request including program ID information to the set-top box;

The fourth receiving module 36 is configured to receive the encrypted TS data sent by the set-top box, and decrypt the encrypted TS data through the decryption key for storing and playing.

An embodiment of the present invention provides a mobile terminal. The mobile terminal realizes the function of playing programs on the mobile terminal by searching for a set-top box in the same network connection, and by seeking and obtaining services provided by the set-top box. On the one hand, it saves expenses for users; on the other hand, it improves user experience, and transmits program files through encryption and decryption, which protects program files, makes program files no longer simply copied and transmitted, and protects operators Benefit.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. a kind of method based on DVB multi-terminal program playing, it is characterized in that, described method comprises: The set-top box is connected to the LAN and broadcasts the services and IP addresses it can provide; The set-top box receives a connection request from a mobile terminal, and the connection request includes mobile terminal ID information; The set-top box judges whether the request meets a preset condition: When judging that the request does not meet the preset condition, the set-top box returns an error code to the mobile terminal; When it is judged that the request satisfies the preset condition, the set-top box generates a connection file and returns it to the mobile terminal, the connection file contains the public key in the randomly generated RSA key pair, so that the mobile terminal can use The public key is connected to the set-top box; The set-top box receives the program list and EPG request from the mobile terminal and returns the program list and EPG to the mobile terminal; The set-top box receives a program play request from a mobile terminal, and the program play request includes program ID information; The set-top box opens the DVB module according to the program ID information and receives the TS data of the program; The set-top box encrypts the TS data of the program and sends it to the mobile terminal; Wherein, when it is judged that the request satisfies the preset condition, the set-top box generates the connection file and returns it to the mobile terminal, including: when it is judged that the request satisfies the preset condition, it is also necessary to judge the Whether the mobile terminal has been connected, if not, a dialog box will pop up on the display interface of the set-top box, requiring the user to select whether to agree to the connection of the new mobile terminal, if the user agrees to connect, the set-top box generates a connection file and returns to The mobile terminal, otherwise, returns an error code to the mobile terminal. 2. The method for playing programs based on DVB multi-terminals as claimed in claim 1, wherein the preset conditions include: allowing the mobile terminal to connect, the total number of the mobile terminal connections not exceeding the maximum number allowed and the The above mobile terminal does not have a large number of connections in a short period of time. 3. a kind of method based on DVB multi-terminal program playing, it is characterized in that, described method comprises: The mobile terminal connects to the local area network and searches for a set-top box that provides services in the local area network; The mobile terminal sends a connection request including the ID information of the mobile terminal to the set-top box, so that the set-top box can use the ID information to determine whether a preset condition is met; When judging that the request does not meet the preset condition, the mobile terminal receives an error code returned by the set-top box; When it is determined that the request satisfies the preset condition, the mobile terminal receives the connection file generated by the set-top box, and the connection file contains the public key in the randomly generated RSA key pair, so that the mobile terminal can use the The public key is used to connect the set-top box; The mobile terminal sends a program list and an EPG request to the set-top box; The mobile terminal sends a program play request including program ID information to the set-top box; The mobile terminal receives the encrypted TS data sent by the set-top box, and decrypts the encrypted TS data through a decryption key, and stores and plays the encrypted TS data; Wherein, when it is determined that the request meets the preset condition, the mobile terminal receiving the connection file generated by the set-top box includes: if it is determined that the request meets the preset condition, it is also necessary to determine whether the mobile terminal Whether it has been connected, if not, a dialog box will pop up on the display interface of the set-top box, requiring the user to select whether to agree to the connection of the new mobile terminal, if the user agrees to connect, the mobile terminal receives the connection generated by the set-top box file, otherwise receive the error code returned by the set-top box. 4. The method for playing programs based on DVB multi-terminals as claimed in claim 3, wherein the preset conditions include: allowing the mobile terminal to connect, the total number of the mobile terminal connections not exceeding the maximum number allowed and the The above mobile terminal does not have a large number of connections in a short period of time. 5. A multi-terminal program broadcasting system based on DVB, characterized in that the system comprises: The first connection module is used to connect the set-top box to the local area network and broadcast the services and IP addresses that the set-top box can provide; A first receiving module, configured to receive a connection request from a mobile terminal, where the request includes ID information of the mobile terminal; A first judging module, configured to judge whether the request satisfies a preset condition; The first processing module is configured to return an error code to the mobile terminal when the request does not meet the preset condition; generate a connection file and return it to the mobile terminal when the request meets the preset condition terminal, the connection file includes the public key in the randomly generated RSA key pair, so that the mobile terminal can use the public key to connect to the set-top box; The second receiving module is used to receive the program list and EPG request from the mobile terminal and return the request; The third receiving module is used to receive a program playing request from a mobile terminal, the request including program ID information; The second processing module is used to open the DVB module according to the program ID information and receive the TS data of the program; a first sending module, configured to encrypt the TS data of the program and send it to the mobile terminal; Wherein, the first processing module is specifically configured to: when the request does not meet the preset condition, return an error code to the mobile terminal; when the request meets the preset condition, it needs to judge Whether the mobile terminal has been connected, if not, a dialog box will pop up on the display interface of the set-top box, requiring the user to select whether to agree to the connection of the new mobile terminal, if the user agrees to connect, generate a connection file and return to the the mobile terminal, otherwise an error code is returned to the mobile terminal, and the connection file includes the public key in the randomly generated RSA key pair, so that the mobile terminal can use the public key to connect to the set-top box. 6. The DVB multi-terminal program playing system as claimed in claim 5, wherein the preset conditions include: allowing the mobile terminal to connect, the total number of the mobile terminal connections not exceeding the maximum number allowed and the The mobile terminal does not have a large number of connections in a short period of time. 7. A set-top box, characterized in that, said set-top box comprises the multi-terminal program playing system based on DVB according to claim 5 or 6. 8. A multi-terminal program broadcasting system based on DVB, characterized in that the system comprises: The fourth connection module is used to connect to the local area network and search for a set-top box that provides services in the local area network; A fourth sending module, configured to send a connection request including mobile terminal ID information to the set-top box, so that the set-top box can use the ID information to determine whether a preset condition is met; A fourth judging module, configured to judge whether the request satisfies a preset condition; A fourth processing module, configured to receive, by the mobile terminal, an error code returned by the set-top box when the request does not meet the preset condition; and receive, by the mobile terminal, an error code when the request meets the preset condition. The connection file generated by the set-top box, the connection file contains the public key in the randomly generated RSA key pair, so that the mobile terminal can use the public key to connect to the set-top box; A fifth sending module, configured to send a program list and an EPG request to the set-top box; A sixth sending module, configured to send a program play request including program ID information to the set-top box; The fourth receiving module is used to receive the encrypted TS data sent by the set-top box, and decrypt the encrypted TS data through the decryption key and store and play it; Wherein, the fourth processing module is specifically configured to: when the request does not meet the preset condition, the mobile terminal receives an error code returned by the set-top box; when the request meets the preset condition, Then it is also necessary to judge whether the mobile terminal has been connected, if not, a dialog box will pop up on the display interface of the set-top box, requiring the user to select whether to agree to the connection of the new mobile terminal, if the user agrees to connect, the mobile The terminal receives the connection file generated by the set-top box, otherwise it receives the error code returned by the set-top box, the connection file contains the public key in the randomly generated RSA key pair, so that the mobile terminal can use the public key to connect to the set-top box. 9. The DVB multi-terminal program playing system as claimed in claim 8, wherein the preset conditions include: allowing the mobile terminal to connect, the total number of the mobile terminal connections not exceeding the maximum number allowed and the The mobile terminal does not have a large number of connections in a short period of time. 10. A mobile terminal, characterized in that the mobile terminal comprises the DVB-based multi-terminal program playing system according to claim 8 or 9.